<template>
  <div id="app">
    <ul>
      <li v-for="(item,index) in arr" :key="index">
        <span>{{item}}--{{index}}</span>
        <button @click="del(index)">删除</button>
      </li>
    </ul>
    <button @click="add">生成</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [],
    };
  },
  methods:{
    add(){
      const num = Math.floor(Math.random() * 11)
      this.arr.push(num)
    },
    del(index) {
      this.arr.splice(index,1)
    }
  }
}
</script>